Use new irqdomain interfaces to allocate/free IRQ for HPET, so we could
kill GENERIC_IRQ_LEGACY_ALLOC_HWIRQ later.

Signed-off-by: Jiang Liu <jiang....@linux.intel.com>
Cc: Konrad Rzeszutek Wilk <konrad.w...@oracle.com>
Cc: Tony Luck <tony.l...@intel.com>
Cc: Joerg Roedel <j...@8bytes.org>
Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
Cc: Bjorn Helgaas <bhelg...@google.com>
Cc: Benjamin Herrenschmidt <b...@kernel.crashing.org>
Cc: Rafael J. Wysocki <r...@rjwysocki.net>
Cc: Randy Dunlap <rdun...@infradead.org>
Cc: Yinghai Lu <ying...@kernel.org>
Cc: Borislav Petkov <b...@alien8.de>
Cc: Srivatsa S. Bhat <srivatsa.b...@linux.vnet.ibm.com>
Cc: Andy Lutomirski <l...@amacapital.net>
Link: 
http://lkml.kernel.org/r/1416894816-23245-4-git-send-email-jiang....@linux.intel.com
Signed-off-by: Thomas Gleixner <t...@linutronix.de>
---
 arch/x86/kernel/hpet.c |    8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c
index 319bcb9372fe..24db2d33fab7 100644
--- a/arch/x86/kernel/hpet.c
+++ b/arch/x86/kernel/hpet.c
@@ -11,6 +11,7 @@
 #include <linux/cpu.h>
 #include <linux/pm.h>
 #include <linux/io.h>
+#include <linux/irqdomain.h>
 
 #include <asm/fixmap.h>
 #include <asm/hpet.h>
@@ -476,7 +477,7 @@ static int hpet_msi_next_event(unsigned long delta,
 static int hpet_setup_msi_irq(unsigned int irq)
 {
        if (x86_msi.setup_hpet_msi(irq, hpet_blockid)) {
-               irq_free_hwirq(irq);
+               irq_domain_free_irqs(irq, 1);
                return -EINVAL;
        }
        return 0;
@@ -484,9 +485,10 @@ static int hpet_setup_msi_irq(unsigned int irq)
 
 static int hpet_assign_irq(struct hpet_dev *dev)
 {
-       unsigned int irq = irq_alloc_hwirq(-1);
+       int irq;
 
-       if (!irq)
+       irq = irq_domain_alloc_irqs(NULL, 1, NUMA_NO_NODE, NULL);
+       if (irq <= 0)
                return -EINVAL;
 
        irq_set_handler_data(irq, dev);
-- 
1.7.10.4

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